Automatic train stop and signal.



W. HQ HARRIS. AUTOMATIC TRAIN STOP AND SIGNAL APPLICATION FILEDIEB.1,1909.

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I 7 APPLICATION FILED FEB.1,1909. 933,440, Patented Sept. 7. 1909.

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W. H. HARRIS. AUTOMATIC TRAIN STOP AND SIGNAL.

APPLICATION FILED FEB. l, 1909.

SHEET 3 Patented Sept. 7

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WILLIAM HENRY HARRIS, STARK, MONTANA, GARBIETY, F LO'IHROP,

MONTANA.

AUTOMATIC TRAIN sroze AND SIGNAL.

,To all whom it may concern:

Be it known that I, TVI'LLIA M HENRY HARRIS, a citizen of. the UnitedStates, residing at Stark, in the county of Missoula and State ofMontana, have i and useful Improvements in Train Stops and Signals,lowing is a specification.

his invention is an automatic engine and train stop and signal devicefor use 011 rail- Ways, and designed to be carried in the cab of theengine and to operate automatically to stop the train under certainconditions, acting to apply the air brakes and close the throttle and atthe same time to exhibit a signal to the engineer to indicate that thetrack is not clear. I

The invention relates particularly to devices used in the cab, and willbe actuated by any suitable trip placed at the side-of the trac whichtrip may be connected to a switch or to a signal tower or otherwiseactuated when conditions exist requiring that the train be stopped.

The invention is illustrated inthe accompanying drawings in which-Figure 1 is a side elevation of an engine provided withthe device. Fig.2 is a' diagrammatic plan view illustrating the vari ous connections anddevices. Fig. 3 is a side elevation of the throttle closing appliances.Fig. 4 is a plan view of a modification, in which the throttle-closingdevices are operated by steam.

The apparatus is electrically operated and may be so plied withnecessary current from any suita le source. I have shown storagebatteries at 6, but at night the currentmay be taken from an electrichead light dynamo, if the engine is provided with one, by means ofsuitable switch connections which any person skilled in the art cansupply. One line 7 from the source of current is con nected throughsignal lamps 8, which may be the ordinary incandescent lamps, to aswinging arm or pendulum 9 hinged at 10 at its upper end to a suitablebracket or support on the side of the engme. This arm has an armature 11located opposite an electro-magnet'12, and normally held away from themagnet by a spring 13. A contact point 14 is supported adjacent themagnet in such positlon that when the armature swings to the magnet. thecircuit is closed,

Specification of Letters, Patent. Application filed February 1, 1909.Serial No.

invented certain new 3 Automatic of which the fol- Patented Sept. 7,1909. 475,334.

i the wire 7 being connected to the arm 9 and the coil of the .magnetbeing connected to I the contact 14. From the magnet the wire 5 15extends to a switch 16 in convenient position for operation b theengineer. This switch is held normally closed bya spring 17, and fromthe switch a return wire 18 extends to the battery, passingintermediately through the coils of a solenoid 19.

The core 20 of the solenoid has an armature 21 andv is pivotallyconnected at 22 to position to turn upon a standard or post 24 adjacentto the ordinary throttle 'valve of the engine. This disk is connected bya link :25 to the throttle lever 26, the connection between the disk andthe link being formed by a pin 27 in a slot 28 in the end of the link.The disk is also connected by a link 29 to a lever 30 on the stem ofthe'valve 31 in the air supply pipe 32 which is connected to the airbrake system of the engine or train. The disk may also be connected by acord 33 to the whistle. A spring 34 is fastened to the post 24 and itsfree end bears between lugs 35 at the rim of the disk, and tends to turnsaid disk back to retracted or inoperae tive position. A trip suitableto operate "the pendulum or arm 9 is indicated at 36, erected beside thetrack in position to strike said arm when the trip is elevated in anysuitable manner.

In operation, when the trip is set, it strikes the lower end of the arm9 and throws the armature 11 against the, magnet 12. at.- the same timeclosing the circuit of said magnet, the switch 16 being closed. Thesolenoid 19 is also actuated. The magnet 12 is energized and holds thearmature 11 thereto, keeping the circuit closed even after the enginepasses the trip. The solenoid 19, by means of the core rod 20, turns thedisk 23 in the direction indicated by the arrow. This pulls the throttlelever forward and closes the throttle, and at the same time opens theairvalve 31 and applies the brakes. The whistle is also sounded by meansthe lamps 8, being in circuit, are lighted. To restore the parts, the"engineer opens the switch 16, allowing the arm 9 to drop to originalposition, and the spring 34 turns the disk back and releases the brakes.The

throttle remains closed by a movement of the ASSIGNOR OF ONE-HALF T0WILLIAM of the core 33, and

pin 27 in the slot 28. but caitbe immediately a disk 23 which is mountedin horizontal valve.

exactembodiment shown. The devices work opened by theengineer, who canalso control the brakes by the usual engineers brake The turning diskand connected parts Will be located in the cab, under the observationot' the engineer, and the parts will be so connected and arranged as toperform the functions indicated. Obviously many changes may be made inthe particular arrangement or construction of the parts, within thescope of the invention, which is not limited to the on a normally opencircuit, which saves the battery, but by having the arm 9 close thecircuit of the magnet 12 the circuit remains closed until manuallyopened by the engineer.

In the modified form shown in Fig. at the disk-23 isoperated by steam,by means of a cylinder 40 having therein a piston with a rodtl connectedto the disk 23 the same as the solenoid core 20- above' described. Thiscylinder is supplied at its front end with steam by a pipe 42 leadingfrom the boiler. 43 is a spring behind the piston 42h, and it serves tonormally advance the piston to the front end of the cylinder. The pipe42 is controlled by a two-way valve 45 which in one position lets steaminto the cylinder and into the other, position exhausts the sametherefrom through a vent-pipe 46. The stem of the valve doll-as a lever47 connected to the. core 20 of a solenoid 19 which is in the circuitthe same as the solenoid 19 above described. \Vhen' the solenoid isactuated the steam valve will be opened and steam will be admitted tothe cylinder and the disk 23 will be turned by a'movement of thepiston.- When the solenoid is deenergized, the spring 48 will serve toclose the steam valve and exhaust the cylinder and. the spring 43 willreturn the disk to original position. The operation of the disk by steammay be advantageous in view of the fact that considerable power isrequired to shift an ordinary throttle-lever.

I claim:

1. In an electric signal for railroad engines, the combination with acircuit having therein aswinging trip-actuated arm which acts to closethe'circuit and a magnet in the I circuit which then holds said tll'lltin closed engine.

t. In an electric signal for railroad engines, the combination of aturning disk, a solenoid operatively connected to said disk to turn thesame, trip-operated means to energize the solenoid, and a linkconnecting the disk and a valve in the airbrake pipe, to apply thebrakes when the disk is turned by the solenoid.

5. Inan' electric signal for railroad engines, the combination of aturning disk. a

solenoid operatively connected to said disk to turn the same,trip-operated means to energize the solenoid, and a brake device and athrottle device connected to said disk, to apply the brakes and closethe throttle when the disk is turned by the solenoid. means to manuallyopen the solenoid circuit, and means to return the disk to originalposition without opening the throttle.

In testimony whereof, I attlx my signature in presence of two witnesses.

WILLIAM HENRY HARRIS. Vitnesses V. J. Gnnnrrr, EUGENE VVESSINGER.

